I filmed 3 sirens in 3 different counties on April 1st. Federal Signal 3T22A Chilhowee, MO: kPXHmnsOFw4 Headed over to Johnson County first to visit this 3T22 in Chilhowee. This siren is controlled by the Johnson County EMA and gets tested on the first Wednesday at 10 AM (weather permitting). ACA Al...